The 21st century and society 5.0 era of Indonesia has improved various areas of life, economy, socio-culture, poli=cs, defense, security, and others. In addi=on to facing the demands of the 21st century and society 5.0, ...

This research was motivated by the difficulties of junior high school students in linear equation system material. The focus of this research is to produce the Hypothetical Learning Trajectory (HLT) system of linear equations ...